need help on a,b,c, and d!

1. A random sample of patients who attended a clinic was selected. The age of the patient (years) and the number of days since the last visit were collected and are displayed in the figure below. The least- squares regression line for predicting number of days since the last visit from the age of the patient is y = 600.08 - 8.69x. 450 400 350 300 250 Days Since Last Visit 200 150 100 50 0 10 20 30 40 50 60 70 80 Age of Patient a) Interpret the slope in the context of the problem. b) Interpret the y-intercept in the context of the problem. Is y-intercept meaningful? Briefly explain. c) What is the predicted number of days since the last visit to the clinic for a 52-year-old patient? d) What is the predicted age of a patient when the number of days since the last visit to the clinic is 200 days